Compared to a normal Green Bloon, the Swarm Green card has 15 less health per bloon but has one extra charge. Swarm Greens are only used for aggro decks, but due to their low health per cost, Swarm Green sees little use over competitors like Swarm Yellow Bloon.
This is the only Bloon card with both three charges and 2 Gold cost per bloon. In the earliest rounds, this is more reachable than, for instance, a Yellow then a Yellow next turn.
For instance, one Swarm Green can be played first and followed up next round with two Swarm Greens.
This card provides more total damage and health than Green Bloon, but due to the higher cost to play all three charges, it’s more reccomended to use Green Bloon for Aggro decks.